The OAuth 1.0 Protocol

This section contains the generic implementation of RFC5849. Learn how to create an OAuth 1.0 provider in these frameworks:

  1. Flask: Flask OAuth 1.0 Server.
  2. Django: not ready yet.

Servers

class authlib.specs.rfc5849.AuthorizationServer
create_authorization_response(request, grant_user=None)

Validate authorization request and create authorization response. Assume the endpoint for authorization request is https://photos.example.net/authorize, the client redirects Jane’s user-agent to the server’s Resource Owner Authorization endpoint to obtain Jane’s approval for accessing her private photos:

https://photos.example.net/authorize?oauth_token=hh5s93j4hdidpola

The server requests Jane to sign in using her username and password and if successful, asks her to approve granting ‘printer.example.com’ access to her private photos. Jane approves the request and her user-agent is redirected to the callback URI provided by the client in the previous request (line breaks are for display purposes only):

http://printer.example.com/ready?
oauth_token=hh5s93j4hdidpola&oauth_verifier=hfdp7dh39dks9884
Parameters:
  • request – OAuth1Request instance.
  • grant_user – if granted, pass the grant user, otherwise None.
Returns:

(status_code, body, headers)

create_authorization_verifier(request)

Create and bind oauth_verifier to temporary credential. It could be re-implemented in this way:

def create_authorization_verifier(self, request):
    verifier = generate_token(36)

    temporary_credential = request.credential
    user_id = request.user.get_user_id()

    temporary_credential.user_id = user_id
    temporary_credential.oauth_verifier = verifier
    # if the credential has a save method
    temporary_credential.save()

    # remember to return the verifier
    return verifier
Parameters:request – OAuth1Request instance
Returns:A string of oauth_verifier
create_temporary_credential(request)

Generate and save a temporary credential into database or cache. A temporary credential is used for exchanging token credential. This method should be re-implemented:

def create_temporary_credential(self, request):
    oauth_token = generate_token(36)
    oauth_token_secret = generate_token(48)
    temporary_credential = TemporaryCredential(
        oauth_token=oauth_token,
        oauth_token_secret=oauth_token_secret,
        client_id=request.client_id,
        redirect_uri=request.redirect_uri,
    )
    # if the credential has a save method
    temporary_credential.save()
    return temporary_credential
Parameters:request – OAuth1Request instance
Returns:TemporaryCredential instance
create_temporary_credentials_response(request)

Validate temporary credentials token request and create response for temporary credentials token. Assume the endpoint of temporary credentials request is https://photos.example.net/initiate:

POST /initiate HTTP/1.1
Host: photos.example.net
Authorization: OAuth realm="Photos",
    oauth_consumer_key="dpf43f3p2l4k3l03",
    oauth_signature_method="HMAC-SHA1",
    oauth_timestamp="137131200",
    oauth_nonce="wIjqoS",
    oauth_callback="http%3A%2F%2Fprinter.example.com%2Fready",
    oauth_signature="74KNZJeDHnMBp0EMJ9ZHt%2FXKycU%3D"

The server validates the request and replies with a set of temporary credentials in the body of the HTTP response:

HTTP/1.1 200 OK
Content-Type: application/x-www-form-urlencoded

oauth_token=hh5s93j4hdidpola&oauth_token_secret=hdhd0244k9j7ao03&
oauth_callback_confirmed=true
Parameters:request – OAuth1Request instance.
Returns:(status_code, body, headers)
create_token_credential(request)

Create and save token credential into database. This method would be re-implemented like this:

def create_token_credential(self, request):
    oauth_token = generate_token(36)
    oauth_token_secret = generate_token(48)
    temporary_credential = request.credential

    token_credential = TokenCredential(
        oauth_token=oauth_token,
        oauth_token_secret=oauth_token_secret,
        client_id=temporary_credential.get_client_id(),
        user_id=temporary_credential.get_user_id()
    )
    # if the credential has a save method
    token_credential.save()
    return token_credential
Parameters:request – OAuth1Request instance
Returns:TokenCredential instance
create_token_response(request)

Validate token request and create token response. Assuming the endpoint of token request is https://photos.example.net/token, the callback request informs the client that Jane completed the authorization process. The client then requests a set of token credentials using its temporary credentials (over a secure Transport Layer Security (TLS) channel):

POST /token HTTP/1.1
Host: photos.example.net
Authorization: OAuth realm="Photos",
    oauth_consumer_key="dpf43f3p2l4k3l03",
    oauth_token="hh5s93j4hdidpola",
    oauth_signature_method="HMAC-SHA1",
    oauth_timestamp="137131201",
    oauth_nonce="walatlh",
    oauth_verifier="hfdp7dh39dks9884",
    oauth_signature="gKgrFCywp7rO0OXSjdot%2FIHF7IU%3D"

The server validates the request and replies with a set of token credentials in the body of the HTTP response:

HTTP/1.1 200 OK
Content-Type: application/x-www-form-urlencoded

oauth_token=nnch734d00sl2jdk&oauth_token_secret=pfkkdhi9sl3r4s00
Parameters:request – OAuth1Request instance.
Returns:(status_code, body, headers)
delete_temporary_credential(request)

Delete temporary credential from database or cache. For instance, if temporary credential is saved in cache:

def delete_temporary_credential(self, request):
    key = 'a-key-prefix:{}'.format(request.token)
    cache.delete(key)
Parameters:request – OAuth1Request instance
exists_nonce(nonce, request)

The nonce value MUST be unique across all requests with the same timestamp, client credentials, and token combinations.

Parameters:
  • nonce – A string value of oauth_nonce
  • request – OAuth1Request instance
Returns:

Boolean

get_client_by_id(client_id)

Get client instance with the given client_id.

Parameters:client_id – A string of client_id
Returns:Client instance
get_temporary_credential(request)

Get the temporary credential from database or cache. A temporary credential should share the same methods as described in models of TemporaryCredentialMixin:

def get_temporary_credential(self, request):
    key = 'a-key-prefix:{}'.format(request.token)
    data = cache.get(key)
    # TemporaryCredential shares methods from TemporaryCredentialMixin
    return TemporaryCredential(data)
Parameters:request – OAuth1Request instance
Returns:TemporaryCredential instance
classmethod register_signature_method(name, verify)

Extend signature method verification.

Parameters:
  • name – A string to represent signature method.
  • verify – A function to verify signature.

The verify method accept OAuth1Request as parameter:

def verify_custom_method(request):
    # verify this request, return True or False
    return True

Server.register_signature_method('custom-name', verify_custom_method)
validate_authorization_request(request)

Validate the request for resource owner authorization.

validate_oauth_signature(request)

Validate oauth_signature from HTTP request.

Parameters:request – OAuth1Request instance
validate_temporary_credentials_request(request)

Validate HTTP request for temporary credentials.

validate_timestamp_and_nonce(request)

Validate oauth_timestamp and oauth_nonce in HTTP request.

Parameters:request – OAuth1Request instance
validate_token_request(request)

Validate request for issuing token.

class authlib.specs.rfc5849.ResourceProtector
exists_nonce(nonce, request)

The nonce value MUST be unique across all requests with the same timestamp, client credentials, and token combinations.

Parameters:
  • nonce – A string value of oauth_nonce
  • request – OAuth1Request instance
Returns:

Boolean

get_client_by_id(client_id)

Get client instance with the given client_id.

Parameters:client_id – A string of client_id
Returns:Client instance
classmethod register_signature_method(name, verify)

Extend signature method verification.

Parameters:
  • name – A string to represent signature method.
  • verify – A function to verify signature.

The verify method accept OAuth1Request as parameter:

def verify_custom_method(request):
    # verify this request, return True or False
    return True

Server.register_signature_method('custom-name', verify_custom_method)
validate_oauth_signature(request)

Validate oauth_signature from HTTP request.

Parameters:request – OAuth1Request instance
validate_timestamp_and_nonce(request)

Validate oauth_timestamp and oauth_nonce in HTTP request.

Parameters:request – OAuth1Request instance

Models Mixin

class authlib.specs.rfc5849.ClientMixin
get_client_secret()

A method to return the client_secret of this client. For instance, the database table has a column called client_secret:

def get_client_secret(self):
    return self.client_secret
get_default_redirect_uri()

A method to get client default redirect_uri. For instance, the database table for client has a column called default_redirect_uri:

def get_default_redirect_uri(self):
    return self.default_redirect_uri
Returns:A URL string
get_rsa_public_key()

A method to get the RSA public key for RSA-SHA1 signature method. For instance, the value is saved on column rsa_public_key:

def get_rsa_public_key(self):
    return self.rsa_public_key
class authlib.specs.rfc5849.TemporaryCredentialMixin
check_verifier(verifier)

A method to check if the given verifier matches this temporary credential. For instance that this temporary credential has recorded the value in database as column oauth_verifier:

def check_verifier(self, verifier):
    return self.oauth_verifier == verifier
Returns:Boolean
get_client_id()

A method to get the client_id associated with this credential. For instance, the table in the database has a column client_id:

def get_client_id(self):
    return self.client_id
get_oauth_token()

A method to get the value of oauth_token. For instance, the database table has a column called oauth_token:

def get_oauth_token(self):
    return self.oauth_token
Returns:A string
get_oauth_token_secret()

A method to get the value of oauth_token_secret. For instance, the database table has a column called oauth_token_secret:

def get_oauth_token_secret(self):
    return self.oauth_token_secret
Returns:A string
get_redirect_uri()

A method to get temporary credential’s oauth_callback. For instance, the database table for temporary credential has a column called oauth_callback:

def get_redirect_uri(self):
    return self.oauth_callback
Returns:A URL string
class authlib.specs.rfc5849.TokenCredentialMixin
get_oauth_token()

A method to get the value of oauth_token. For instance, the database table has a column called oauth_token:

def get_oauth_token(self):
    return self.oauth_token
Returns:A string
get_oauth_token_secret()

A method to get the value of oauth_token_secret. For instance, the database table has a column called oauth_token_secret:

def get_oauth_token_secret(self):
    return self.oauth_token_secret
Returns:A string